Laserfiche WebLink
Six relle monitor the Saga Creak alluvium. Well WSAL12 is located on Saqe Creek adjacent <br />• to Surfaea Water Site FC4 and is doxnatream of all potential mina disehazgea. TDS values <br />at this cell have been increasing since it xse drilled in 1990. Wall WSAL13 is located <br />belor NPDES 009 (this NPDES site started flowing !or the first time aver in 1996). No <br />distinct TDS trend is apparent at this call. Wells YSAL1, 3, 8, and 12 aze also part of <br />SCC'a Yoast Hine monitoring network and era all upstream of Seneca II-W. Since no mine <br />related diarhargea from Yoaat have yet occurred at Saqe Creek, TDS values at these four <br />wells aze a result of natural conditions. <br />In the Probable Hydrologic Conaequencae section (PHC, Tab 17) of the Seneca II-W PAP, <br />predictions rare made !or the annual average TDS values at vazious alluvial walla. In the <br />Hubberaon Gulch alluvium, a valve of 1299 mg/1 was predicted for Wall WAAL7-2, while a <br />value of 1293 mg/1 was observed this year. In the 006 Culch alluvium, a valve of 3394 <br />mg/1 was predicted, while a value of 1827 mq/1 was observed this year. In the Saqe Creek <br />alluvium, a value of 972 mq/1 was predicted, while a value of 670 mg/1 was observed this <br />year. <br />wedge Overburden. Three walla monitor the Wedge overburden. Well WOV14 exhibits a <br />• decrees inq TDS trend. Only three samples have been collected no £az for Well WOV16 (these <br />is normally not enough water to sample), so a TDS trend cannot ba determined. Wall WOV17 <br />exhibits an increasing TD9 trend. <br />The Seneca II-W PHC predicts annual average TDS values at various Wedge overburden rolls. <br />For Well WOV14, a value of 4385 mq/1 roe predicted, rhila a value of 3670 mq/1 was <br />observed this year. For Well WOV17, a value of 4295 mq/1 roe predicted, xhile a value of <br />8960 m9/1 xse observed. This predicted value (4295) xaa predicated on a premininq value <br />of 4072 mg/1, which ie an average of several overburden cells. However, Well WOV17 <br />exhibiteQ a premising TDS average value of 8043 mg/1. <br />Wadga Coal. Three wells monitor the Wedge coal seam. Well WW14 exhibits a nearly level <br />TDS trend. A June 1996 TDS value of 4410 mq/1 appears to be anomalously high since <br />subsequent values era much loxer. Wall WW16 displays an increasing TDS trend. Well WW17 <br />exhibits a nearly level TDS trend, in spite of an anomalously high TDS value in May 1995 <br />(1710 mg/1). Subsequent TDS values at this wall aze much lover. <br />• <br /> <br />